UV-Vis Spectrum of Porphyrin with Salts 2

Notes

The Al3(SO4)3 10mM solution was very opaque and cloudy with some precipitate slightly falling out of solution. Before using the Al3(SO4)3 solution, it had to be swirled to ensure that all precipitate was in solution.

Also for the FeSO4 10mM salt solution, it was prepared in a 50mL volumetric flask instead of a 100mL volumetric flask.

Also for the 10mM salt solutions of Fe2(SO4)3 and Na2SO4, these solutions were actually prepared through the process of dilution in conical test tubes. 1mL of the 100mM salt solution for each substance was taken and diluted with 9mL of HPLC grade H2O to produce the 10mM salt solution of each substance.